Hot Water Boilers


Type: Three Pass Fire Tube Steel Boiler

  • Steel boiler body with horizontal tube exchanger
  • High efficiency stainless steel turbolators
  • Removable rear smoke box with inspection cleaning door
  • Front door insulated with refractory material, equipped with a flange for burner mounting and flame inspection pipe
  • Rockwool body insulation of 50 mm up to 100 mm thickness (depends the model)
  • Electrostatically painted external covers
  • Control panel for electromechanical operation (optional)

Following Directives

  • Directive92/42/ EEC Performance requirements for new hot-water boilers fired with liquid or gaseous fuels.
  • Directive2014/30/ EU Directive on electromagnetic compatibility.
  • Directive 2014/35 / EU Directive on electrical equipment intended for use within certain voltage limits.
  • Directive2009/125/ EC Eco design requirements.
  • Regulation 813/2013 Eco design Regulations.
  • EN 60335-1, Safetyof household and similar electrical appliances.
  • EN 60335-2-102 Safety of household and similar electrical appliances.
  • Special requirements for gas, oil or solid fuel combustion appliances which have electrical connections.
  • EN 55014-1, EN 55014-2 Electromagnetic compatibility – Requirements for household appliances, power tools and similar devices.

The Working Pressure is

  • 4 bars up to 400 kW and
  • 6 bars from 455 up to 1000 kW boilers (Higher working pressure is possible under your specific construction demands)
  • High efficiency, over 92 %
  • Temperature of the gases evacuated on chimney, 190-230°C
  • Compatibility with any gas/ oil fuel pressure burners

Technical Specifications


The new burner with optimised profiled for perfect combustion at all power levels, to the fully electronic modulation pump and to the 1:10 modulation range, these boilers provide particularly high efficiency over the whole operating field. As a consequence, even in spring and autumn, when the system energy demand is lower, these boiler allow high energy savings even when running at low power. Extremely high efficiency, compliant with L.D. 192/05 as subsequently amended.

Main Features

  • Stainless steel condensing exchanger
  • Electrical protection IPX5D
  • Less switch-ons/switch-offs thanks to the 1:10 power modulation
  • Pump with fully electronic modulation (ERP ready)
  • Ready for cascade installations
  • External tank hourly programming
  • Analogue and digital indication of heating circuit pressure
  • Microprocessor electronics
  • RANGE RATED certified: the max heat input (heating) of the boiler can be adjusted according to the real thermal requirement of the plant
  • Low NOx emissions (class 5)
  • Chimney-sweeper, anti-frost and pump anti-lock
  • Ready for operation with external tank, with dedicated pump or three-way electric crossover valve and anti-legionella function
  • High efficiency, according to 92/42 EEC (former 4 star classification) and low consumptions
  • Ready for remotely controlled and/or outdoor temperature
    sensor operation

Technical Specifications


INDIRECT GAS FIRED CALORIFIER is the ideal solution for maximum energy savings. It has the answer to economy, low emission, and immediate fuel alteration based on the free use of solar energy, together with the very low cost fuel of LPG or OIL.  INDIRECT GAS FIRED CALORIFIER is an innovative solar boiler.
In its simplest form has two standards stainless steel coils heat exchangers.
One exchanger is connecting with solar collectors and the second exchanger supply the hot sanitary water (DHW).
For HEATING you can use a gas/oil burner when, an additional exchangers will take advantage of any other form of energy you have as Heat Pump or Solar
Electrical resistance is another option of energy sources.

Technical Specifications